﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


public class GenericList<T>
{
    private Node<T>? head;
    private Node<T>? tail;

    public GenericList()
    {
        tail = head = null;
    }

    public Node<T>? Head
    {
        get => head;
    }

    public void Add(T t)
    {
        Node<T> n = new Node<T>(t);
        if (tail == null) head = tail = n;
        else
        {
            tail.Next = n;
            tail = n;
        }
    }
    public void ForEach(Action<T> action)
    {
        Node<T>? current = head;
        while (current != null)
        {
            action(current.Data);
            current = current.Next;
        }
    }
}

